TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 997 of 1313
INSUFFICIENT BRAKES (VEHICLE STOPPING DISTANCE TOO LONG, NO APPARENT AIR SYSTEM
FAILURE WITH GAUGES AT NORMAL OPERATING PRESSURE, WARNING BUZZER NOT SOUNDING) -
Continued
STEP
5.
IS THERE PROPER AIR PRESSURE AT THE RIGHT FORWARD-REAR REAR SERVICE BRAKE
CHAMBER?
a.
Stop engine and open all draincocks until brake system air pressure is vented.
b.
Close all draincocks.
T0203DAA
Service Brake
Chamber
Adapter Fitting
Tee
Delivery Line
Transducer
Figure 4.
Rear Service Brake Chamber.
c.
Disconnect delivery line from right forward-rear rear service brake chamber adapter
fitting (Volume 3, WP
0434). Refer to point to point schematics.
d.
Disconnect pressure gauge and tee from vehicle and return air line to original condition.
e.
Move tee to between disconnected service brake chamber and delivery line.
f.
Verify pressure gauge is connected to tee.
g.
Assistant starts engine and runs to build air supply to normal operating pressure.
TM 9-2320-272-23-1
0120
0120-8
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